I bought a Casper mattress protector because for my new Casper mattress and to say the least I'm disappointed.  I go out of my way to make sure there are no wrinkles or creases on top when I put it on, however, every time within one night of sleeping the protector gets theses creases that are so bad you can see them through the sheets. Not to mention they are uncomfortable and feel like you are laying on a stick on your mattress.  Expected a much better product from a company that specializes in bedding.